If you're worried about opening it up you'll probably be worried when you mod it and then break it.
Send it off to one of the places that mod it for you. I've seen places online (uk based) ask for £50 to do it.. thats with the mod chip. after you buy a soldering iron, modchip, flux, wire, tri wing etc.. you're not going to be that far off £40+ anyways.

the only concern is with later chips that are showing to be d2c. I'm not sure where that plays for you people, but earlier usually is fine. search around. there's a serial database that can be of help in predicting what your wii has

more than likely gonna be a D2B chip which is perfectly moddable
may have the legs cut cos its roundabout the time started doing that
still perfectly moddable if they are cut just a slightly more difficult install